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Finding the Fourth Proportional to 13,096.99, 18,065.68 and 7,990.17

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Solution

The fourth proportional to 13,096.99, 18,065.68 and 7,990.17 is: 11,021.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,096.99 : 18,065.68 = 7,990.17 : x
  2. Step 2: Convert to fraction form
    13,096.99/18,065.68 = 7,990.17/x
  3. Step 3: Cross multiply
    13,096.99x = 18,065.68 × 7,990.17
  4. Step 4: Simplify right side
    13,096.99x = 144,347,854.37
  5. Step 5: Solve for x
    x = 144,347,854.37/13,096.99
  6. Step 6: Final answer
    x = 11,021.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.